1883 and 1923 (the Yellowstone pre-main-series-shows) if they count. Both were excellent. Lawman Bass Reeves too, all Sheridan shows.
Id mention Rescue Me as well. Start to end, fucking great.
And, at least so far anyways, The Boys.
'We're not gonna make it, are we? People i mean.'
'It's in your nature to destroy yourselves.'